Temperature-indicating mechanism



Patented Dee. l8, 1928 w v 7' i I i l i i ITED garl c) Fr es.

STANLEY oRsY rHi BARKER, or CHICAGO, limiters.

v 1TEMPERATUREQNDICATING MECHANiSM.

Ap ucatioamed September 2o, i921." --s r'i' 1 ms] 5o1,9 ss."

'Ihe'present invention relates to signal de member and in't'hecorrelation of each memvices andhas'to do particularly Wit'htempera' herWith the'other members. g ture actuated 'orthermal alarms. 1 "Referringnow to Figures 1, 2, and 3, it I ell knowing-the mentala-ssozoiationwitlr Will be noted-that'the housing comprises an Ichan-Qes' in temperature-ofthe rise and fall of upper sectionor signalcasing 10, cylindrical 60 thefiuid Within the capillary stemofa t'herlu-form, having' 'a boss ll at its lower-most Il1OlYlet6I',-l11:, imaryobjectliasbeen todes point, and a lower section or stem 12"for viseamechanismin which an increaseoftem enclosing a thermal member 13.Intermev perature is indicated by a rise ina visuals-igdiate theeasingand the thermalmem-ber 10 nal, and .a reduction in temperature by a 13the stem'12 is provided with a rctangular" '65 loweringot such signal. 1passagawthe purpose of which Willbelater Secon'darily, it'is an objectto provide a descr1bed. e mechanism, accurateyrapid, and certainof 'Thewal'ls 0f th'estern 12 which surround operation, in which the signal, ismovedand completely enclose the thermal-member 15 against a fixedandconstantresistance. Ad! 13, are-thinned out or of r edueed'fthicknessditionally, it is, an object of'this' invention to admit ofrapidconduction of heat orcold to provide a particularly ."=etl ectivealarm," to the thermal member 13;" This latte'rfcom magnifying theexpansion and-contraction prises lalninationso' f metal's ha'vingunequal of the actuating member inadevice of simple expansion byincrement of heat,'bound one to 2 structure, of inexpensive manufacture,and another in the ordinary-manner, such men1- in Whiohthe parts are'soconstructed and arber beingsubstantially U 'sh'apedandhavrangedthatdisorder'is almost impossible; 'g' 6 1d piv ly t0 y mTheseand such otherobjects-'as-n1ay:hereof levers 14, ordinarilydesignated lazy tongs," inaiter appear are attained by, thenov'el-conpassing u nvardly thim'igh the stein12 into 25 strnction,combination and arrangementof the'casing-lO, Where the-upper extremitiesparts to be hereinafter specifically described are joined} to theshutter -or indicator 15 and claimed.- 3 Reference.avill'now be hfadtofiby a pair of inwardly pointed short bars, the accompanying drawingforming apartiof designated 14-. r I this specification, wherein: l"Said indicator "-15,=-having parallel sides 30 "Fi 141 3fragmentary-front View :of i and a rectangular con-liguration,isprovided 585 the invention; a Q I '-withfanextension fifupoii'its'l-ower -side to" FigureIQ is a vertical section of one emfacilitate connectionavitlr'the' ibars l4. =RebOCllCHTGIlt OfmYinvention, ciprocating'ireely uponthejparallel'ftracks Figu e3'is{19173111031gectionigf the game 16, the supports"l6 iof which arefastened embodimento-f"myinvention at'-'right --amgles 1n 5038l11g 1O,'t'he indicator 15' responds int =t1 ati fFi :2; y {'st-antlytoany'impiilse'communicated tothe' F-igure 4 is a fragmentaryverticzvhseetion 1aZy'- OI1gS ll by the thermal member 18,

of'a' second embodiment o l the' invention, f which latter is arrangedto bend invvar'dlyat Figure 5 is asimilar View ofa thirdem it's endsupon theappl-ication-o'f heat thereto. ebodi-ment'of the invention; andThe nn-its of the lazy-tongs 14E areguided Figure 6 isa detail(in-perspective) "clari against displacement and held in vertical fy-ingstructural features of the embodiment Y alignment: by the i parallel'Walls of the aperdiselosed in Figure 5. I f-tured-" stem 12, thuspreventing;lostmotion Li-lie reference oharacters arerusedupontheWithout nhduefriction.

the invention WlIlOhlfOllOWS to indicate isimi 1 provided with flatglass plates, suchas lO, l f t v ,7 onewside thereof may be providecl'-*With a As shown; the-deviceacomprises;broadly, s meniscus lens, 10for enhancing the visnalit-y a therinalv-member, a signal membem:aetu-t'oftheindicator 15. 'The latter is prefer-ably 50 ated by thethemnalrmemberyrand a housing ofa' bright color While the 'glassenc l1O- eX- 4 membervfor said thermal andslignalsmem cept its centralportion 17 is colored black bers; 1 The inventionresi'des the'form andor some dnll co'lor, to accelerate visibility of operation of theseveral 'members referred the signal. 4 I v to, in the agencyemployedfor=communicato 'Indicia of any'desired type, as, for exahr' 55 ingvariations-intemperaturet0 the signal ple, the Words Average, Danger,and 110 1'draavin'gs andthroughout therdesoriptionof :While both'rendsof the casing 10" may be Freezing, shown in Figure 1, may be arranged toprovide, by reference to the position of indicator with respect thereto,for instantly understanding thermometric conditions existing about andin the vicinity of thermal member 13.

If it is desirable or preferable to avoid painting or marking the glassend 10, an

. apertured disk, upon which the necessary incold reversesthe directionof its distortion.

The impulses from the movements of said member 13 are received by andcommunicated, in a magnified form, through the lazytongs to. theindicator 15 which rises with an increase and falls with a reduction oftem perature. A thermometric or other scale could be substituted fortheindicia here disclosed. At all times the weight of the indicator 15and the lazy-tongs 1 1 is borne di rectly by the thermal unit 13,irrespective of the position of the indicator 15 or lazy-tongs 1 1. v I

In Figure 4, and in Figures 5 and 6, two additional embodiments of myinvention are illustrated. In the first of these figures, it is showedthat I employ a thermal element 13 comprising two U shaped membersriveted together to form a W shaped element. The outer end of one ofsaid U shaped members is rigidly affixed to the housing 12. The outerend of the other of said members actuates an indicator 15 through a.lever 18, fulcrumed at 18. The longer arm of said lever 18 is pivoted toa short bar 19 similarly attached to a bar or stem 14: dependingvertically from indicator 15 while the shorter arm of said lever 18 isactuated by a bar 20, pivotally connected at one end to said short leverarm'and at its other end to the mov able end of element 13.

By this arrangement of parts, the indicator 15 is displaced downwardlyand upwardly concurrently with every impulse of the movable end of 13*,while the magnitude of the displacement of said indicator 15 is tothatof the thermal element 13, a number of times greater.

In Figure 5 a compound thermal element 13" similar to or identical. withelement 13 of Figure 1 is shown. Instead of securing said elementto thehousing, stem or casing for the thermal element, 1 provide a plate 21and supporting disk 22 connected in the man ner showed in Figure 6.

threaded to receive a threaded tubular stem not shown which completelysurrounds but does not engage element'13 or plate 21 and as :it isscrewed home forces the disk against a shoulder at the termination ofthe rectangular passageway through the boss 11, saidboss being aperturedin the same manner-as boss 11 depicted in Figures 1, 2 and 3. Except forthe portion bent downwardly to form tongue 23, the disk 22 is of the,same i diameter as the threaded portionof boss 11.

Upon the lower surface of said shoulder are depending vertical pins orstuds 24: adapted to be inserted through apertures 25 in disk 22positioned to correspond with said pins or. studs 24 whereby tofacilitate alignment of plate 21 with indicator 15 and to prevent rotarydisplacement of said plate 21 and the parts supported thereby. V

The thermal element 13 may be secured rigidly, at one end, to plate21'by a pin or.

other fastening means, or a stud may be arranged upon said plate 21 toallow for slight oscillations of the thermal element, the connectionbetween the plate 21 and the thermal. element 13 being indicated by theordinal 26. At its other end, said thermal element 13 is pivoted to theshort arm of a bell crank lever 27 fulcrumed on a stud 28 carried byplate 21. Depending from and afiixed to the indicator 15 to admit ofoscillatory motion, is a relatively long bar 29. The lowermost extremityof said bar 29, is pivoted to one end of a lever 30 oscillating upon astud 1 fastened to plate 21 at a point more elevatedthan the lowermostextension of bar 29. In termediate the lever 30 and the extremity-of thelonger arm of bell crank lever 27 is a link 31 having pivotalconnections at its opposite ends with lever 30 and lever 27. Theposition of the pivot between link 31 and [lever 30 upon the latter,is'a factor in determining the magnitude of the displacement ofindicator 15 as will be readily appreciated.

Ever distortion inward or outward of the therma member 13 is thuscommunicated to latter having a linear magnitude several.

120 the indicator 15, the displacement of the I employ and which provideenlarged displacements of the indicator member direct- 1y proportionalto the distortion of the thermal member but which may also be modifiedto give slight displacement to the indicator between the extremes of anormal condition and accelerated movement, in either direction, upon theapproach of a dangerous high or low degree 01 temperature.

While I have illustrated several forms of myinvention,-it is manifestthat I have not illustrated every means by which the invention can becarried out. It is, therefore, not my intention to be limited to thedisclosures illustrated but to claim all modifications, changes, andalterations of and to the means depicted which come within the spirit ofthe invention.

l/Vhat I claim is new and desire to procure by Letters Patent of theUnited States is 1. In a temperature indicating mechanism, athermostatic element, a housing therefor, a vertically reciprocal signalin said housing, and a plurality of levers intermediate said signal andsaid element whereby the movement of said element is translated into aver-- tical displacement of said signal.

2. In a temperature indicating mechanism, a thermostatic element, ahousing therefor, a vertically reciprocal signal in said housing, andconnecting means intermediate said sig' nal and element'to accentuatethe translation of said signal responsive to the movement of sai'dthermostatic element.

3. A temperature indicating device including a housing, a signal, athermostatic element, and connecting members therebetween, saidconnecting members comprising a lever having one end pivoted to saidhousing, means for actuating the signal in a linear path at the otherend of said lever, and means con necting said lever to the thermostaticelement and engaging said lever at a point intermediate its ends.

4. A signal device comprising a housing, vertically reciprocating signalmeans within 7 said housing, a plate member disposed in said housing, ahorizontally expansible thermostatic element having one end movablyconnected to said plate, and a plurality of levers associated with saidplate and pivotally secured to the free end of said thermostatic elementand to said signal means.

5. In a temperature indicating device, a reciprocating shutter, a casingtherefor, an L shaped plate carrying a plurality of levers forincreasing linear displacement, a thermostatic element secured to saidplate and to the least displaced of said levers, a housing for saidL-shaped plate and said thermostatic element, and a link intermediatethe most displaced of said levers and said reciprocating shutter, saidhousing and casing when connected engaging said L-shaped platetherebetween to maintain the device inoperable position.

6. In a temperature indicating mechanism,

' a thermostatic element, a housing therefor, a

vertically reciprocal signal in said housing, and connecting meansintermediate said signal and said thermostatic element whereby themovement of said element is translated into a vertical displacement ofsaid signal.

In testimony whereof I affix my signature.

STANLEY FORSYTH BARKER.

